21131030330 has 32 divisors (see below), whose sum is σ = 39748541184. Its totient is φ = 8080180416.

The previous prime is 21131030317. The next prime is 21131030369. The reversal of 21131030330 is 3303013112.

It is a junction number, because it is equal to n+sod(n) for n = 21131030299 and 21131030308.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 502577 + ... + 542996.

It is an arithmetic number, because the mean of its divisors is an integer number (1242141912).

Almost surely, 2^21131030330 is an apocalyptic number.

21131030330 is a deficient number, since it is larger than the sum of its proper divisors (18617510854).

21131030330 is a wasteful number, since it uses less digits than its factorization.

21131030330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045670.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21131030330 its reverse (3303013112), we get a palindrome (24434043442).

The spelling of 21131030330 in words is "twenty-one billion, one hundred thirty-one million, thirty thousand, three hundred thirty".